The secret document, believed to have been written by Jeremy Corbyn’s immigration policy advisor Lachlan Stuart, revealed Labour has considered bringing back a previously scrapped visa scheme if it wins the General Election, according to the Daily Telegraph.

The controversial policy could allow unskilled labourers to move to the UK after Brexit.

The leaked five-page document reportedly outlines plans to reintroduce the tier three entry route which was scrapped under David Cameron in 2013.

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Jeremy Corbyn during a live debate earlier this week refused to provide a figure on immigration

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Mr Corbyn was quizzed by audience members on Labour's immigration policy

Plans to introduce a green card system – which would be automatically granted to EU nationals living in the UK – and scrapping financial restrictions on family visa are also said to be detailed in the Labour immigration paper.

The alleged Labour document said: "We envisage a requirement to make continued use of the current five-tiered visa system, including the currently unused tier applicable to those seeking low-skilled, unskilled or seasonal work.

"The numbers might go up or down but not as a consequence of these changes. We are not setting false, misleading, divisive targets.”

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Jeremy Corbyn during a visit to Hackney Marshes Football Pitches, to highlight Labour's manifesto commitment to ensure 5% of the Premier League's television rights income is diverted to the grassroots game, during a General Election campaign

The numbers might go up or down but not as a consequence of these changes

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Earlier Diane Abbott admitted that cutting migration would not be a priority for the party if it won the General Election.

She said: "We will not, as Theresa May has done, prioritise controlling immigration, not to say that we don't believe we shouldn’t have fair rules and management or migration. We will prioritise the economy, that's what will be different."

Immigration Minister Robert Goodwill told the Telegraph: “This leaked plan is the latest sign that Jeremy Corbyn and Diane Abbott will never reduce immigration because they simply don’t believe in doing so.

“Only Theresa May and her Conservative team will reduce immigration as we leave the EU while making sure our economy continues to attract the brightest and best workers it needs.”